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In the UK, the so-called robot cars have so far only been tested on private roads.

However, in the United States, Florida, Nevada and California have already passed legislation surrounding autonomous cars.

They will use much of the technology available at the moment, such as lane assist, which pulls the car back into its lane when it starts to drift, advanced cruise technology and emergency braking.

And they will make use of breakthroughs that have allowed car makers to introduce guided parking.

Cars will use a fusion of all these technologies using sensors and cameras on rural and semi-rural roads initially, with passengers who will have the choice to intervene.

Driverless cars will have the biggest impact on the youngest and oldest among us.

They will allow young people to be in charge of vehicles sooner and in more safety, according to the experts, because the car will take over.

Older folk may find that driverless cars offer the attractive prospect of increased mobility later in life. Young people – the Xbox generation – are enthusiastic about the technology but the over-65s are more reluctant to trust the cars as safe – until the advantages are explained, it is claimed.

David Bruce, director of AA Cars, said: “There is a big leap of faith needed by drivers from embracing assistance systems to accepting the fully automated car.

“The fact that advanced technology could enhance the mobility of an ageing generation adds a certain appeal to older drivers if it will keep them driving longer.

“Technology is not a prison. We must embrace technology as, ultimately, it will make our cars safer.”